APA引文

Winther, O. O., & Ray Allen Billington. Transportation frontier: Trans-Mississippi west,1865-1890.

Chicago Edition Citation

Winther, Oscar Osburn, and Ray Allen Billington. Transportation Frontier: Trans-Mississippi West,1865-1890.

MLA引文

Winther, Oscar Osburn, and Ray Allen Billington. Transportation Frontier: Trans-Mississippi West,1865-1890.

警告：这些引文格式不一定是100％准确.